Steam boiler



A n 1,63405 .im 28,1927. H IIAYLQR 6 STEAM BOILER med kann 17. 1924 2 sheets-snm 1 1,634, June 28, 1927. J H. TAYLQR 056 STEAM BOILER Filed March 17. 1924 2 Sheets-Sheet 2v Patented lune 28, 1,927.

.UNETED STATES JAMES HALL TAYLOR, OF OAK PARK, ILLINOIS.

STEAM BOILER.

Application led March 17,

The invention relates to steam boilers and more particularly to the internally fired type, in which the combustion-chamber is formed of metal which is independent of, or supported without being stayed to, the boiler head or walls', so that the chamber aid boiler walls may expand and contract independently, responsively to dierential temperature conditions or pressures in the water chamber and the combustion chamber.

The object of the invention is to provide an improved construction for combustion chambers of this type which will eliminate the stay bolts between the combustion chamber and boiler head, and which will efficient-ly lendure the stresses incident to sharp differential variations in internal and external pressures without fracture or other injurious effect.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims Vat the conclusion hereof. .y Y

ln the drawings: Fig. 1 is a vertical l0ngitudinal. section of a boil-er embodying the invention. Fig. 2 is an end view of the combustion chamber, the boiler wall being shown in section. Fig'. 3 isa section talren on line 3&3 of Fig; 1. Fig. 4 is a section on line 4 4 of Fig. 1.

The invention is exemplified in an internally heated boiler comprising a cylindrical wall or body 4 snpportedby an outwardly bnlged head 5 riveted or secured inany suitable manner to one end of the wall 4 and forming the backl of the boiler, .ahead 7 which maybe bulged outwardly as shown in Fig. 1, and which is secured in any manner, as head 5, to the other end of wall 4 and forming the boiler-front, a Afurnace 8 formed of a hollow pipe, a combustionchamber formed of an outer head 10 and an inner head 11, flues 13 between the Ycombustion-chamber, head 11 and the front-wall 7, and a stack 14 for the products of combustion, into which the flues discharge and which is connected to front wall 7. The furnace 8 may be heated by a grate 9 of the usual construction as shown in Fig. 1, or may be allowed to receive the products of combustion frein an oil burner, Dutch oven, or any other suitable heat producing means.

' The combustion-chamberis independent of or unattached to the boiler-walls, being supported therefrom so as to permitrela- .lar with a chordal top 18.

1924. Serial No. 699,622.

tive or differential' contraction and eXpansion of the combustionchamber and walls responsive to differential contraction and expansion, resulting lfrom variations in the temperature, by loosely interiitting lugs 15 and 16, which are secured respectively to the outer sides of the combustion-chamber and the inside of the wall 4 of the boiler. The boiler walls, stack, flues and furnace may be of any suitable construction, and the boiler is provided with the usual inletfor water 20, outlet for steam 2l, manhole 22 for access to the inside of the boiler, and drain 25 for withdrawal of the water and sediment fromv the boiler, as well understood in the art.

lhen the combustion-chamber is stayed to the boiler walls, it must be constructed so as to withstand marked variations of` differential internal and external not I pressure, and for this purpose the heads l0 and 11 are dished lor bulged outwardly and have their lapped marginsriveted or otherwise securedvtogether at 17, and the outer contour of the combustion-chamber is circu- The yheads 10 and 11 are formed ofboiler-plate and the head 10 is integrally deformed to render it Vmore eiiicient'in withstandingl differential external and internal pressures. The de formations of head 10 consist of transversely fiuted or corrugated portions 10a and longitudinally extending corrnfrations 28 in the top or chordal portion ofy the combustionchamber. These .corrugations malle it possible for the wall of the combustion-chamber to resist external pressure and to expand and contract responsively to marked diffei-, ences or variations in temperatures in the combustion and water chambers.

y The invention exemplifies an internallyl heated type of boiler in which. the combustion-chamber is independent of the boilerpended claims, Without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a boiler, the combination of n'alls forming an outer shell, a furnace disposed inside the shell, a combustion chamber formed independently of said Wallsl and having front and rear out 'fardly and spherically bulged Walls marginally united, the furnace being` joined to one of the Walls of the combustion chamber, and Hues leading,` from the chamber. j

2. In a boiler, the combination of Walls forming an outer shell, a furnace disposed inside the shell, a combustion chamber formed independently of said Walls and having front and rear outwardly and spherically bulged Walls having annular and chordal united margins, the furnace being joined to one of the walls of said combustion chamber, and flues leading,- from the chamber.

3. In a boiler, the combination of an outer shell, a furnace disposed inside the shell, a combustion chamber formed independently of the shell and composed of front and rear Walls, one of said Walls being tinted or corrugated transversely to reinforce it against the stresses of external and internal pressures, the furnace being,` joined to one of said Walls, and flues leading from the chamber.

l. In a boiler, the combination of an outer shell, a furnace disposed inside of the shell, a combustion chamber formed independently of the shell and havingl front and rear outwardly and splierically bulged Walls, one of Vand fines leading from the chamber.

Signed at Chicago, Illinois, this QSth'day shell, a furnace disposed inside the shell, a

combustion chamber formed independently of the shell and having front and rear Walls having annular and cliordal united margins, one of said Walls being integrally and transversely deformed to reinforce it against the stresses of internal and external pressures, the furnace being joined to one of said Walls, and flues leading from the chamber.

6. In a boiler, the combination of an outer shell, a furnace disposed inside the shell, a combustion chamber formed independently of the shell and having front and rear circular Walls having` chordal top portions, the chordal top portion of one of the Walls being fluted or corrugated longitudinally of the furnace, the furnace beingl joined to one of the Walls, and flues leading,` from the chamber. j

7. In a boiler, the combination of an outer shell, a furnace disposed inside the shell, a combustion chamber formed independently of the shell and having front and rear circular Walls having chordal top portions, one of said Walls having` transverse corrugations in its face and corrugations in its ehoi'dal top extending` longitudinally of the furnace,

the furnace being; 'oined to the other Wall of February, 1924. l

JAMES I-IALL TAYLOR. 

